Update:

this error comes from copying symbolic links. Replacing the specific version library with the general library linking to the specific lib solves this problem

libQt5XcbQpa.so.5.4 -> libQt5XcbQpa.so.5

Qt Code: 
  1. ./libqxcb.so: /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: version `Qt_5_PRIVATE_API' not found (required by ./libqxcb.so)
  2. ./libqxcb.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.7' not found (required by ./libqxcb.so)
  3. ./libqxcb.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5' not found (required by ./libqxcb.so)
  4. ./libqxcb.so: /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5: version `Qt_5' not found (required by ./libqxcb.so)
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Also after checking how the qt libs were referenced in "libqxcb.so" i saw it was looking for the qt libraries in the /libs folder 2 folders upwards:

qt_5.6_64bit/libs/qtlibraries....so.5
qt_5.6_64bid/plugins/platforms/libqxcb.so

this resolved all ldd issues for that lib....but sadly it will still not run.

So now I am getting the admin to run the qt installer. Thx for the ppl who read this anyway. Cheers!