There really is no way to accurately measure someone's intelligence. We have so many different mental capacities that it seems ridiculous to quantify them all under one over-arching classification labeled as "intelligence."
Most epistemologists have trouble even understanding what knowledge is, let alone intelligence. The only way to get an idea of how "intelligent" someone is is by observing them and their dispositions to act in such and such ways. But that can only be done on a case-by-case basis and even so will probably still end up being wildly inaccurate. We should stop talking about what people scored on various tests, because they're ultimately worthless.
Without a concrete understanding on what constitutes intelligence, there really is no value in claiming you are intelligent. IQ scores measure different capacities, and so for example if you would like to say you're socially intelligent then maybe a case can be made for positing some relevance into IQ scores that measure a particular capacity. But besides cases like that, it's downright stupid to refer to an IQ score as proof of intelligence.