This is a skew nozzle but with a parallel offset in the radial plane. Only one extra parameter is needed.
(N5) - Radial Distance to Nozzle Center Line
This is a signed distance. The positive direction is defined by the normal of the axes system whose primary is the vessel axis and whose secondary is the nozzle hub centerline projected on the radial plane. The measurement origin is on the radial line parallel to the above projection.