When it comes to the managers office it probably comes from years ago when they'd be the ones to call out for extra baggers too.Fareway employees haven’t worn white dress shirts in 3-4 years. Moved to red polos. Assistant managers wear gray or black. Store managers wear white dress shirts. Employees prepping food either need to wear a hairnet, paper hat, or black baseball cap to keep hair off the food. Manager sits above the produce section to be able to see over most of the store while doing bookwork. Safe, money drawers, sensitive employee records, etc are in the Manager’s office so being elevated makes sense as it’s harder to break into.
Trader Joe's has the same type of setup but they aren't elevated, they are just in the corner.