If you want to add new store location to the map open esx_shops/config.lua
and check Config.Zones there you can find a list of positions per store type which you can adjust or add new ones.
Per default you have 3 different store types so you can add a postion of a certain type.
The same works for a esx_supermarket or other esx scripts which uses the same database strucrure as a esx_shops.
Here showcase of the Esx_supermarket scripts
and here a tutorial how to add a items to the Store