You can create a point by specifying a vertical distance from the current cross section, height of instrument, prism height, and centerline.
The elevation is computed by subtracting the prism height from the value you specified with the Set Height Of Instrument command, and then adding the vertical distance.
To create a point by offset and vertical distance from the current cross section in the Survey Command Window
To create a point by offset and vertical distance from the current cross section, using the survey command language
XS VD (point) (offset) [vertical distance]
BEGIN CL1
NE 1 1000 1000
NE 2 1000 1500
NE 3 1300 1700
END
CL IS CL1
XS 350
HI 200
PRISM 5
XS VD 100 150 7.25
! POINT 100 NORTH: 850.000 EAST: 1350.000
! ELEV: 202.2500