Ok this is really starting to make me mad. If any of you have any idea how to report this clown plz tell me

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

What is the value of x in the diagram below?

Pls! does anybody know a shortcut for answering these types of questions in the future?