You can create a new point by giving an offset and elevation, with respect to the current cross section located on the current centerline.
To create a point with offset and elevation from the current cross section from the Survey Command Window
To create a point with offset and elevation from the current cross section using the survey command language
XS EL (point) [offset] [elevation] (description)
BEGIN CL1
NE 1 1000 1000
NE 2 1000 1500
NE 3 1300 1700
END
CL IS CL1
XS 350
XS EL 100 45.72 58.7502
! POINT 100 NORTH: 954.2800 EAST: 1350.0000 ELEV: 58.7502
Point 100 is offset from cross section 350 by a distance of 45.72 with an elevation of 58.7502. Distance and elevations are in the current units unless you type a qualifying suffix.