The nominally tolled section of the NJTP still ends where it always did, at US46. These days the Turnpike Commission, however, has jurisdiction over all of I-95 between US46 and the beginning of Port Authority jurisdiction for the GWB. I've seen signs saying "Begin NJTP maintenance" and "End NJTP maintenance / Begin PANYNJ maintenance" just west of the GWB in recent years, but don't know if they're still there now.
The signage style on I-95 between US46 and the GWB is definitely NJTP style.
And as vdeane pointed out, the exit numbering on I-95, including exit 68, was to match the mileage on the originally proposed I-95.