Thank you. Your suggestion worked. The only problem is that the change also made some changes to my home page that I really did not like.
It looks like I will need to learn how to create a child theme for the shop where the only change that I make in the child theme is the same change that you described.
Thanks for pointing me in the right direction!
Of course, if you have any suggestions on the best way to have a set of pages point to a different / child theme then I am all ears.
I just found a couple of good YouTube videos that show how to use a few plug ins that allow you to have 2 themes on the same site.