No BTC are known to be lost, even those which people claim to be lost could still one day be accessed so they cannot be removed from the supply. Those BTC still exist so they must be considered. So no, the graph should not be changed.
Actually there are nearly 10% lost, by different calculations. By small wallets like private holders losing their private keys for reasons like failed HDD and no backup to big fishes on different crypto-exchanges.
I voted for: yes, but the value can't be determined. Also, this loss doesn't have any influence on the current spot price.
The fact you say 'nearly 10%' and 'by different calculations' is enough to illustrate my point. No one knows how many are lost or if they're really lost forever. As others have pointed out, HDDs can be recovered or maybe one day in the distant future somehow people will gain access to these lost wallets. Unless those coins were destroyed and no longer existed they should always be counted.