Indeed, the TJunction value of this processor is 100°C: http://ark.intel.com/products/53469/Intel-Core-i7-2670QM-Processor-(6M-Cache-up-to-3_10-GHz)
The TJunction is a number established by Intel® as a point of reference in order to understand what could be expected as per normal processor temperature.
Anything from the Tjunction and below will be the expected temperature of the processor in normal use, anything that doesn't stress out the processor (watching movies, burning CDs, browsing the internet, creating documents, etc.) When the processor is stressed out meaning that you are running heavy processor applications that take control of the CPU or uses it at 100% the temperature will go beyond the Tjunction. It can perfectly reach 100 to 110 degrees and the processor will still be OK. The cooling fan is in charge to keep that temperature there.
If the processor temperature reaches 110 degrees or more it will send a signal to the motherboard to shut down to prevent mayor damages and most likely it won't be possible to turn the computer back in until it cools down.
The normal processor temperature will depend on the chassis type, the hardware involved and the location of the computer, and it usually is lower than the Tjunction value.
Taking the previous into consideration your processor seems fine. If you need troubleshooting assistance, feel free contacting your system builder.
I´m having a similar problem with my new XPS 15, it has the same processor but when it reaches 100° C it Underclocks from 10% to 20% (in about 10 minutes when doing intensive processing work), it´s a bad call since i need the full power from the CPU to work quicker, is this a normal approach or should i consider calling a support tech guy?
Thanks in advance,