Today, I saw -50rep added to my reputation in my Movies.SE account, as a result of deletion of a user. So definitely one or more answers to his question(s) was/were deleted. So is there a way to see the deleted posts?
An entry in your reputation history that says:
-50 User was removed
does not mean you lost 50 points because an answer of your was deleted.
An entry liike this mean an entire user was removed and as such, all of their votes were invalidated. This specific user upvoted 5 of your answers or 10 of your questions, or some combination of both, so you lost that rep when they were removed.
Had an answer of yours been deleted (due to a post being removed), you would have seen an entry listing the specific post name (with an unclickable link)
You can find posts of yours that have been recently deleted on your "recently deleted answers" and "recently deleted questions" pages.
You can find these by going to the "question" and "answer" tabs of your profile, and looking for the links at the bottom of the page.
If it was not deleted recently, then there is no easy way for an ordinary user to find it.
If you have "10k/access to mod tools", you may be able to find it under "Recently Deleted" in the in the "Delete" tab of
/tools if there haven't been many other recent deletions.