NORM.DIST
Category: Statistical Function.
Description: Returns the normal distribution for the specified mean and standard deviation.
Syntax: NORM.DIST(x,mean,standard_dev,cumulative)
'X' is the value at which you wish to evaluate the distribution function.
'Mean' is the arithmetic mean of the distribution.
'Standard_dev' is the standard deviation of the distribution.
'Cumulative' is a logical value that determines the form of the function.
If cumulative is 'TRUE', NORM.DIST returns the cumulative distribution function; if it is 'FALSE', it returns the probability mass function.