If it is a static (non-animated) cursor, you can do that by clicking on the "Redraw" link on that cursor's page and the moving the hot-spot in the online editor. And there is some basic checking going on if you are uploading from RWCE, but cannot be too restrictive, as sometimes the hot-spot intentionally weird.
Website Hotspot Fixer
What if RWD website had a hostpot fixer
It would be great if there was an option to fix hot-spots for already uploaded cursors, if you've seen my profile you know 3 of my first 2018 cursor sets have hotspot problems and unfortunately I don't have the time to fix them. Or- just make it so that if a cursor is severely off it's hot-spot just auto fix it or say a message like "cannot upload- hotspot is off" so that we know and can go fix it.