Am I to assume that u is for the mean and
o is for the standard deviation?.
If so,
If x=9, then z=-1.
What is the z score for -1?.
Surely you're told the distribution! What is the context of the question? Is it a question from a problem set on normal distribution? Binomial distribution ....?
If you can't provide all the necessary background information to the question you're not going to get much help.