Yes, How much are these shoes, is correct. You want to know about something specifically, and replying you may say it's 67 dollars. I would reply "They meaning the shoes are 67 dollars" or specify the shoes if someone asks about different things at once like: How much are these shoes, shampoo and dress? I would reply the shoes are 37 dollars, shampoo is 2 dollars and the dress is 100 dollars.

I personally say the latter "how much are these shoes?" and I think it's a lot more common for people to ask this way (given that you're either pointing to or holding the shoes) The response is perfect :)