Makerbot Replicator (5th generation) poor print quality
Your printer is improperly leveled with respect to the distance of the nozzle to the bed. This, and a high raft to print part distance, causes consecutive layers to not adhere well. 

PLA should not need that high temperatures to print nor does it need a raft. Rafts are interesting when printing filaments that have high shrinkage. Furthermore, a 90 mm/s infill speed is pretty high, and do not use the part cooling fan for the first few layers (if you cool too much it can curl up).

You need to re-level the bed and make sure that the nozzle to build plate distance is the thickness of a sheet of A4 paper when Z = 0.