Once the top is cut off, it will form side branches ...
Norfolk Pines from Cuttings
1.
According to the University of Florida, to start fill a 4-inch plastic pot with sanitary, fast-draining medium such as peat moss or coarse sand. Pour water onto the medium and stir it around until it feels moderately moist throughout. Let the excess water drain from the holes at the bottom of the pot for 10-to-15 minutes before potting the Norfolk pine cutting.
2.
Gather a 6- to 8-inch cutting from the terminal leader of the Norfolk pine, which is the vertical stem located at the top of the plant. Sever the cutting where it emerges from the symmetrically arranged cluster of side branches using a utility knife. Do not use a side branch as a cutting because it will create an irregularly shaped tree.
3.
Strip off the needle-like foliage from along the lower half of the stem. Dust the stem with rooting hormone powder, then tap it to knock loose the excess powder. Create a planting hole in the medium that is deep enough to hold the leafless part of the Norfolk pine stem.
https://homeguides.sfgate.com/propagate-norfolk-pine-houseplant-89574.html
= new reply since forum marked as read