Zooming on an image within a boundary / border

Hello - 

I've seen solutions that almost do what I need but haven't been able to get it using nesting. 

I have an image on the right side of the screen (I've thrown in a generic image in the attached file for example purposes) - I need to do a subtle zoom on that image without that left edge moving - so it's zooming within that third or so right-hand portion of the frame.

Seems like this should be simple but it doesn't seem to be. I've got a series of images I need to do this on so any advice on quick and simple solutions will be much appreciated - thanks in advance!