stillwaterll, a healthy Dracaena deremensis 'Janet Craig' has slender stalks which are green when healthy. Black discoloration of the leaves and upper stem indicates over watering while a tan coloration of the lower section points to a dried out condition.
The former can be managed by inducing drying conditions and pruning the dead/discolored tissue.
For the latter condition, removal of the affected stalks is the best course of action.

Thanks for the tip. I'll keep an eye on the water and hold on to the plant for a while longer.