Short answer is no you don't have to worry.
Let alone the possibility of every model of CPU being slightly different with idle and loads temps, each CPU from teh same model can differ, then ytou have to add the fact that it is relative to the situationit is in..ie if you really wanted to compare your cpu temps, you would have to dso it with the same model in the same laptop.
Anyways you don't have to wrry, if it gets too hot the CPU will soon let you know by shutting down, then you could have a problem. Anywyas according to spec finder the maxz temp is about 100 see:http://processorfinder.intel.com/details.aspx?sSpec=SLGF4
I wouldn't worry. A laptop is designed to run quite hot as this saves power cooling it. 50 degress or more is hot to us, but to a piece of silicon it is still quite chilly
I've had laptops that haven't spun a fan until the processor reached 70 degrees in order to save energy and be quiet.