WorksheetFunction.Phi (Excel)

Returns the value of the density function for a standard normal distribution.

Phi (Arg1)

Arg1: Number for which you want the density of the standard normal distribution.

Dim dblArg1 As Double: dblArg1 = 
Dim dblPhi As Double
dblPhi = WorksheetFunction.Phi(Arg1:=dblArg1)