Values of a normal random variable lying a given number of standard deviations above and below the mean, from the variance

The random variable \(Y\) follows a normal distribution with mean \(64\) and variance \(36\).

1. Find the value \(y\) such that \(y\) is \(0.85\) standard deviations greater than the mean of \(Y\).[4]
2. Find the value \(y\) such that \(y\) is \(0.85\) standard deviations less than the mean of \(Y\).[2]