Yes, to an extent. There was a large proportion of houses which are 'believed' to contain shop fronts. This is evident as most houses opened directly on to the street. However, Andrew Wallace-Hadrill conducted a study of Pompeian houses and concluded that there is no such thing as a standard house in Pompeii or Herculaneum. Hadrill identified four different groups of houses, combining various degrees of residential and commercial function.
The Four Different Groups of Houses:
1) Shops & workshops with 1 or 2 roomed residences behind or above. (This group is to which most houses belonged, hence why there were so many shops.)
2) Larger workshop residences of 2-7 rooms, some with an atrium & even richly decorated.
3) Average house: 8 -13 rooms, most with an integrated workshop or shop, symmetrical plan & common architectural features eg atrium & gardens.
4) Largest houses ( villa urbana) designed for hospitality & large-scale admission of visitors, separate space for slaves; 2 atria; ornamental gardens, peristyles; decorated.
If you're looking for a great source on Pompeian houses my Ancient teacher is obsessed with Andrew Wallace Hadrill and always recommends "Houses and society in Pompeii and Herculaneum". It was a great source and helped greatly with the core topic. It is very detailed, and certainly far more than what we need for the HSC, but it's useful nonetheless.
Pompeii was a highly commercial town, due to its geographical location. Therefore there was a high emphasis on economy and shops within the town. Hence, why there is the conclusion that many dwellings contained rooms designed as shops.
The general evolution of the Domus Romana due to society itself is also a factor. There is evidence that further division of larger houses into apartments due to population pressure and some grand renovations occurred. And then again population growth and economic growth saw the incorporation of shop fronts and workshops as part of residences, particularly along main thoroughfares, hence the reason for the quantity of shops.
Hopefully this helped you out.
If not Good luck with your inquiry, if you need anything else just ask.