When calculating the sum of torques in a free body diagram, an applied torque at a different point can still be considered. The torque generated by a couple, which consists of equal and opposite forces, remains consistent regardless of the pivot point chosen. Therefore, when summing torques about a specific point, the applied torque can be included as it contributes to the overall rotational effect. Understanding the relationship between torque and pivot points is crucial for accurate calculations. This concept is fundamental in mechanics and helps clarify the analysis of rotational systems.