Assume that you are exerting a constant force on in the upward direction and that you are moving the object upward with uniform velocity. The net force on the object is zero. The force you are exerting is equal in magnitude and opposite in direction to the force of gravity. As you are lifting the object you are doing work on the object. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force.
Work is a scalar, a number with units.
F d is the work done by a constant force. A free-body diagram of an object being lifted with constant velocity is shown below. The displacement vector points in the upward direction. F net d is zero. The work done by a force can be positive or negative.