I cannot tell if the tree is diseased without a closeup of the part green needles along the bottom.  I suspect there is a disease process happening since there are needles dropping at the top as well as the bottom.  However that could also be a sign of severe stress. For more information on what to look for as far as disease-see the following website:
https://apps.extension.umn.edu/garden/diagnose/plant/evergreen/spruce/branchesdead.html

Second the tree is planted too near the house and deck.  This restricts the water and sunlight.  Replanting it deeper is not going to solve the issues and will probably kill it.  As it matures the drooping branches may cover the lower area.  I suggest that you dig it up and plant it in a better location if no disease found upon closer inspection.