Not sure what you mean by the V8. The 2008 Highlander only came in V6 and I4 engines, so I assume you are talking about the 2GR-FE V6.

Also, the 134 ft pounds is not right...that will sheer off a spark plug. It might be 134 in-lbs (~11 ft-lbs)?

Here are the official Toyota torque specs for each engine:
2GR-FE (V6): 13 ft-lbs
1AR-FE (I4): 18ft-lbs

Honestly, if you torqued to the 18ft-lbs spec, then these numbers are within the range of each other and shouldn't warrant you digging back in to re-torque them. Drive it and don't worry about it.

 

Hello thank you. Sorry v8 is a typo and it is v6. And it is 13 ft not 134. Thanks alot sir

 

If you would have messed up for it to be a problem you would have stripped the threads.
Also, If you used genuine Denso or NGK Iridium plugs and not cheap fakes from Fleabay or a ScamAzon 3rd party seller you don't need to worry about them for another 120K Miles

NOTE: When below 20 ft-lbs I convert and use my small in-lbs torque wrench.

 

The small Harbor Freight torque wrench that I just bought specifically for this task starts at the 20 ft/lbs. I ended up just hand tightening and giving one gentle tug with the ratchet.