Hi Terri,
This is the right place to ask questions.
You have the chance to not only shorten that stem but end up with more plants in the bargain. Cut the rosettes off with a sharp knife - leave about 1/2 inch of stem attached to the rosettes. Let the cut stem dry out for a couple days then plant in new cactus and succulent soil. Water sparingly until it roots.
If you cut the now headless stems to an inch or so above the potting soil, they will grow new little rosettes along the stem.
The center of the stem can also be rooted. You can cut it into sections or lie the entire piece on a pot of soil.
Are your cactus and succulents in sphagnum moss?? ACK!
