That’s a little bit more involved. You’d be doing a few things. First off you’d still need to roto that area so that be able to remove the background. That would effectively create a “hole” where the background was.
Then you’d need to create a “clean plate” that you’d use to cover the hole. The clean plate would need to be tracked somehow so that it would stay attached over the hole in the background if and when the camera moves.
Then you’d probably need to do some compositing to make the clean plate blend into the background. If any objects pass in front of that area while your clean plate area is onscreen (i.e. the woman in the purple shirt moves by it) you’d need to roto those objects as well.
Usually, if you want to remove something from a background, your best bet is to use a blue or green screen and then chroma key out the colors.. Removing backgrounds via chroma keying is generally much, much, much easier than trying to rotoscope something out once it’s shot.