Data Center Proxies are the best proxies to use for Shopify Sites.
Available Locations: New York, Chicago, LA
When you checkout, there will be a box that says "Special Instructions for Seller", in this box put the Quantity you want for the specific location.
For example, if you order 10 proxies and want all 10 in New York, write something close to "Please put all 10 of my proxies in New York". If you order 10 proxies and want 5 in New York and 5 in Chicago, write something close to "Please put 5 of my proxies in New York and 5 of my proxies in Chicago".