<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\00296";
}
</style>
</head>
<body>
<p>Question Mark Inverted using Hexa Decimal: ʖ</p>
<p>Question Mark Inverted using HTML Code: ʖ</p>
<p id="point">Question Mark Inverted using CSS Entity: </p>
</body>
</html>