Re: Stock a shelf with ...
As you can see, BrE and AmE have different terms for this. In BrE, "to stack shelves" is the activity and a "shelf-stacker" is the member of staff. It can carry rather negative connotations - "You haven't got a real job. You stack shelves for a living!" The job is sometimes used as evidence that someone is not making the most of their abilities or qualifications - "He's got a degree in Applied Maths but he's stacking shelves in Sainsbury's! What a waste!"
(Sainsbury's is a large chain of supermarkets in the UK.)
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.