Here’s how you can use the Probability Calculator  in 
GeoGebra to compute probabilities from the normal distribution: 
     GeoGebra Instruction 1
Probability     Calculator View     in         Menu.         Distribution     tab         at         the         top         of         the         window.         Normal     from         the         drop-down         list.         Enter         the         values         of                and                from         your         problem.         Left-sided Interval Two     tailed,         or         Right-sided