I am having trouble with the following problem:

P(Z > +1.34)
Would someone help me?

If you've already normalized the number you're interested in, then look up in your tables (the normal distribution tables) to find 1.34 standard deviations and look for the probability associated with it.
According to my calculator the probability a normally distributed observation is greater than 1.34 standard deviations of the norm is .090123

Thank you for the help!