Selenium [WebDriver] was designed to emulate a real user of a web browser and not specifically to interact with a browser at the same time as a real user.
You can use it to execute drag and drop actions on it's own, in which case you will know where you have moved things.
But if you want to see where a real user has dragged an element to after allowing them time to interact with the browser, there is nothing in Selenium that will handle that for you.
Firstly you will need to program that wait for yourself. and you could have your javscript (?) developers store the element moved and it's original and final positions (Xpaths?) in a way that you can retrieve it from your automation code, or you could try to record the positions of all relevant web elements before and after the move and somehow compare the two, or if the draggable element has a unite id or orther identifying properties that would still be the same after the move that might be of help.
What is your use case for this requirement?