Ideally it would be less than 70, but unless the fan outlet is choked with dust/fluff there's precious little you can do about it. I have reduced the temp in some laptops by renewing the thermal paste on the CPU with Arctic Cooling MX-4, but it doesn't always work and you need to know what you're doing as it generally involves a full strip-down. Other option is to sit the laptop on one of those plinths with cooling fans, never tried one so don't know how effective they are.