According to this answer
"Deleted" users have their display name denormalized, their account deleted, and all of their negatively rated posts will be deleted. Anything with a score of 0 or higher is retained with their "ghost" user. This is primarily for scenarios like a user requesting their account for deletion, and it has some degree of reversibility.
If I request Account deletion, negatively rated questions of mine will get auto-deleted even if there is highly voted answers?