Hi Michele, have you tried a magic eraser? I have never used mine for that but it takes off a lot of things that other stuff will not take off.
Grab a tennis ball
You could try wet scrubby and comet and rub spot if it doesn’t come out it’s scratches
I usually use a little vinegar and water mixture with a soft rag.
Is it a scuff from a shoe sole? If so, use a pencil eraser or the toe of a rubber sneaker.