On your TI calculator press 2nd vars 2
a) greater than 1.73
normalcdf(1.73,99999999,0,1) press enter read 0.041815099
b) less than -0.75?
normalcdf(-99999999,-0.75,0,1) press enter read 0.2266272794
c) between -0.12 and 1.15?
normalcdf(-0.12,1.15,0,1) press enter read 0.4226864824
Edwin