What is the probability that a z-score is more than -1.0 rounded to four decimal places?

What is the probability that a z-score is more than -1.0( rounded to four decimal places)?

What is the probability that a z-score is less than -2.25 (Rounded to four decimal places)?

If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. what is the mean IQ score after the scores have been standardized by converting them to z-scores?