FIG. 1 is a perspective view of an articulating shower arm showing my new design;

FIG. 2 is a front view of the articulating shower arm of FIG. 1;

FIG. 3 is a rear view of the articulating shower arm of FIG. 1;

FIG. 4 is a left side view of the articulating shower arm of FIG. 1;

FIG. 5 is a right side view of the articulating shower arm of FIG. 1;

FIG. 6 is a top view of the articulating shower arm of FIG. 1; and,

FIG. 7 is a bottom view of the articulating shower arm of FIG. 1.

The broken line showing of portions of the shower arm is for illustrative purposes only and forms no part of the claimed design.