What are the mean and standard deviation of the standard normal distribution? (b) What would be the mean and standard deviation of a distribution created by multiplying the standard normal distribution by 8 and then adding 75?

What proportion of a normal distribution is within one standard deviation of the mean? (b) What proportion is more than 2.0 standard deviation from the mean? (c) What proportion is between 1.25 and 2.1 standard deviations above the mean?