A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The easiest way, although quite restrictive, would be to place your picture near the top of the worksheet, and freeze panes so that the top rows are always visible.
I don't think there is an OnScroll event in Excel, so I don't see any other way.
Why do you want to do this? There might be another way.
Cheers
Rich