Z = (score-mean)/SD
Since I don't know the mean or SD, I can't help you find the raw score.
Also, your values don't make sense. Do you mean:
Z = 11.22 and Z = 20.48?
If so, those are extremely deviant values. If not, you need to clarify your data.
For the data in question 13, find the raw scores that correspond to the following:
(a) z 5 11.22; (b) z 5 20.48.
2 answers
For the data,
9 5 10 7 9 10 11 8 12 7 6 9
9 5 10 7 9 10 11 8 12 7 6 9