Display all posts for 2 Categories

So the below is the excerpt of the code I’m using to display posts from 2 different categories, 76 and 92. it works fine except it only displays 10 posts… how do I modify this to display all posts that are in these 2 categories.

<?php $paged = (get_query_var('paged')) ? get_query_var('paged') : 1; query_posts(array('category__and' => array(76,92))); ?>
<?php if (have_posts()) : ?>
<?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>