Dude what you are asking for is so bloody pointless.
How will knowing what aligned mark you need going to affect your work?
You need to ask yourself: Will I be JUST AS happy to achieve an ATAR of 95 as I will be with 99.95? If the answer is yes:
Is it so you can reduce your workload? If I were to say you needed 100 for all your HSC aligned results, would this make you work harder than if I said you needed to get 95? If you are nodding yes then does that mean you are cocky enough to consciously restrict the amount of effort you put into your study and exams if the results you required were not as high as you expected? Does this mean you think there is a magic ratio of study/work to results?
I'm fairly sure you are, like every other HSC student, totally lost as to your potential and the correlation between your raw marks in school to the actual aligned result at the end of the year - that you would still study the same amount if you thought you needed to get 90 percent or 100 percent in the exam.
Furthermore, say you DID know the magic ratio of effort to exam results somehow.... there is the problem of comparing school assessments to HSC examinations. School tests account for 50 percent of your HSC result and are not standardized like HSC examinations. Therefore half of your HSC results will be based on tests that you cannot even begin to use an indicator. For example, Ruse Maths tests are very very hard while say Girra is fairly straight forward - thus getting 95 percent in Ruse would probably be more difficult than in Girra. no offence to girraweens...
Continuing along... You never know what your raw marks are for HSC exams, you only find out your aligned marks. This means that you cannot work out how many marks you need to achieve in the exam anyways even if you knew the necessary aligned mark. If i said you needed 91 aligned would you go ohhhh that means I only need to do 91 percent of the test paper? NO. It's scaled. I can get 70/120 for Maths 4 Unit and get a band 6 while obviously in Maths 2 unit i need a much higher percentage.
A more purposeful question would be to ask around how many raw marks out of the test you needed. However, that question is also iffy because the HSC is always changing in difficulty. In addition, i have yet to find a (serious) student who will simply stop at question x because he knows that it is enough to achieve a band 6 (or whatever he is aiming for), have you? HOWEVER, to save myself from some smart ass who will try to criticize/challenge me by stating that in Maths tests sometimes a good strategy is to do say questions 1-6 perfectly and ignore questions 7 and 8 to maximise marks - I am talking in general terms and am completely aware of such exam strategies but that is beyond the scope of this thread.
If you answered no:
Why do you need to know? You want to do the best that you can possibly do. That means trying the best you can possibly do. That means aiming for 100 percent in every exam even when this is impossible.
Don't mean to target you personally OP because I know these questions common... but it doesn't mean they aren't misguided.