Картинка снизу, так как указан <code>style="position:relative; top: 450px;"</code>

<form>
  <p>
    <div align="center" style="position:relative; top: 450px;">
      <input type="image" src="https://assets.codepen.io/2160415/internal/avatars/users/default.png?format=auto&height=80&version=1533997485&width=80" name="submit">
    </div>
  </p>
</form>
code {
  font-style: italic;
  background: #eee;
  padding: 3px;
  border-radius: 3px;
}
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