For Shop Vastu, it's important to consider your shop surroundings, road, shape of the shop etc.
You need to keep the shop area clean and also don't keep any junk in your shop, which attracts negative energy and create negative environment.
North East is good area to have God picture in the shop. Make sure you keep the area clean every day. You can also light the lamp.
You may keep heavy items in your shop in South West, South or West area. Also, shelves to keep items may be kept in these directions.
Avoid heavy items in North East, North or East directions. Some open area in the NE corner also good.
What type of business you have?