These are binomial probabilities.
The p=1/6 and in the first case n=12 and has a lousy approximation via the central limit theorem since n is small.
The answer to the first one is
The second is
where I am assuming that you're including the 14 and 17.
And instead of a normal die you mean a fair die.
You can approximate this via the CLT, the mean is 100/6 and the variance is 100(1/6)(5/6).
The normal superimposed over this binomial is .
Now subtract the mean and divide by the st deviation and use your st normal table.