Not really. It works a bit different:
IQ tests are scored relative to a set of people who are supposed to statistically represent the nation where the test will be used. The test is designed to produce a Gaussian distribution with a standard deviation of 15. The mean is defined as IQ 100. Half of the normal people (those not suffering from mental diseases) have IQs above 100 and the other half are below 100.
IQ = (15 x z-score) + 100, where the z-score is relative to age peers.
Each nation does this, so the tests from a dull nation will still show the average score as 100 and bright nations will also show the mean as 100. In order to compare nations, all test scores must be adjusted to one standard. The one used is the Greenwich IQ Standard (white British). After the conversion, we can compare all nations. Doing that shows the mean IQ for the world is 84. So, on the basis of the full world population, a person with a Greenwich IQ Standard IQ of 100 would be 16 IQ points above the world mean.